[1/5] windowscodecs: Implement QueryCapability in the PNG decoder.

[Dmitry Timoshkov]

Vincent Povirk <madewokherd at gmail.com> wrote:

> >> For JPEG and TIFF, which are extensible formats, there's also the
> >> possibility that an image has something in it that we don't support
> >> (and that the corresponding decoder on Windows doesn't support) but
> >> some other decoder on the system can.
> >
> > A not supported stream format is a bug and should be fixed IMO. I believe
> > that an implementation which declares support for all formats is better
> > than a not implemented stub.
> 
> I'm not sure. There are plenty of standard TIFF files that native
> can't handle (though I don't think it's a bug if we can), and there's
> the possibility of non-standard TIFF files that a corresponding
> third-party decoder can.

That's a pretty questionable argument IMO.

-- 
Dmitry.